Excerpts from “The Growing Right-Wing Terror Threat”, in the New York Times, written June 16, 2015, one day before the Charleston church shooting:

… But headlines can mislead. The main terrorist threat in the United States is not from violent Muslim extremists, but from right-wing extremists. Just ask the police.

In a survey we conducted with the Police Executive Research Forum last year of 382 law enforcement agencies, 74 percent reported anti-government extremism as one of the top three terrorist threats in their jurisdiction; 39 percent listed extremism connected with Al Qaeda or like-minded terrorist organizations. And only 3 percent identified the threat from Muslim extremists as severe, compared with 7 percent for anti-government and other forms of extremism.

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An officer from a large metropolitan area said that “militias, neo-Nazis and sovereign citizens” are the biggest threat we face in regard to extremism. One officer explained that he ranked the right-wing threat higher because “it is an emerging threat that we don’t have as good of a grip on, even with our intelligence unit, as we do with the Al Shabab/Al Qaeda issue, which we have been dealing with for some time.” An officer on the West Coast explained that the “sovereign citizen” anti-government threat has “really taken off,” whereas terrorism by American Muslim is something “we just haven’t experienced yet.”

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Law enforcement agencies around the country are training their officers to recognize signs of anti-government extremism and to exercise caution during routine traffic stops, criminal investigations and other interactions with potential extremists. “The threat is real,” says the handout from one training program sponsored by the Department of Justice. Since 2000, the handout notes, 25 law enforcement officers have been killed by right-wing extremists, who share a “fear that government will confiscate firearms” and a “belief in the approaching collapse of government and the economy.”

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Public debates on terrorism focus intensely on Muslims. But this focus does not square with the low number of plots in the United States by Muslims, and it does a disservice to a minority group that suffers from increasingly hostile public opinion. As state and local police agencies remind us, right-wing, anti-government extremism is the leading source of ideological violence in America.